{
  "manageEntity": {
    "action": "Save",
    "entityId": "242584465",
    "entityType": "Track",
    "nonce": "0x456055f097728987dafc236bc287253e0b24bf957c1cca4f4b39ec6d858f3859",
    "signature": "0xd1b0c8c74cdca0730ac63c222ca2692bbf3e30f0812b19fc32807d086e12d96c59a16cea75b9b94838ca90f0d66a7fc780a2783c7b55efcbf551a60c805aa7881b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}