{
  "manageEntity": {
    "action": "Save",
    "entityId": "202886480",
    "entityType": "Track",
    "nonce": "0x542fb3ad6a9af4ae68d5aec22555d64bbb9d1a8f4041f137ef84c441f48a2ce4",
    "signature": "0x941940f5b746ebc06e5d07d7506505e096c6ced5353bad5350656eb23a62f496786e9532ed6040660f89113c6d7c5169f9fe6c18b37c8ed3116a4328a5d07e1b1c",
    "signer": "0x102a924C1c076Dcb5816d20E32Dcb6F00e75F2C9",
    "userId": "485987672"
  }
}