{
  "manageEntity": {
    "action": "Save",
    "entityId": "54866476",
    "entityType": "Track",
    "nonce": "0x7e237a3e2b8b6508b7865cee4137281dcec07b7de4bb44a51eb5edf8cd6081cd",
    "signature": "0x70bbe0ec795ba521374d05ff3e09d5b816a042f192dbc84724dfb8a0b56dcc864483b025dda31ed348e0e534b918971d12c6db45dfcb20dc9eb2ef60f978b8421c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}