{
  "manageEntity": {
    "action": "Save",
    "entityId": "829203560",
    "entityType": "Track",
    "nonce": "0x5bd5b21385287902834bfb037cf13dbdcfe9b31584716b17ee37e7e7600df624",
    "signature": "0xa1eddbe514c9c3962c20b177cc55eef0b4655062035c99733e513d2630c0aa9550f2e350ebb8261609435a4660ac1ba96856f4eb7f3cfff739bc70e2d8359e331b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}