{
  "manageEntity": {
    "action": "Save",
    "entityId": "762751",
    "entityType": "Track",
    "nonce": "0x964d9abec3d854897d6f5181c60a49a9edb611acdb771b136917a41e94249549",
    "signature": "0x34940c37d9026c6f07f0a7c3a312411a2515d213f1ec93eecfbc85e52d6e83ac6fd1bd7cf3c81139645945bf61d0c81123226f73fc84375aad361424125b4d4f1b",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}