{
  "manageEntity": {
    "action": "Save",
    "entityId": "543867105",
    "entityType": "Track",
    "nonce": "0x08c683994870881ab77deba5b5641af358071efc445c618d1ea9d9f951036506",
    "signature": "0x9f0d232b5aafaa5f6175016e70aa9a978819dfb6a5145ce101a01655f315ed883bf8d17ca3cef8a78d351053b07a87818cfd54e35f1fc30a85792c03a1c1a8021b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}