{
  "manageEntity": {
    "action": "Save",
    "entityId": "1138909989",
    "entityType": "Track",
    "nonce": "0x8820d8f615b2f1ba6fa2fe5df0e46e3caec73e768a0efaee9286dd8c835d8f14",
    "signature": "0x0fc0be192aec102a403014888af525712659caa3aeb639afb4c94771087024e8521d47377b3af4089ed33398424c370d8798a5385585046b547ad93b145be8b81b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}