{
  "manageEntity": {
    "action": "Save",
    "entityId": "1847910340",
    "entityType": "Track",
    "nonce": "0x8a9b07f40e9a79d127af3869029025e519d6bda1aef5c719d511186a0deac556",
    "signature": "0xa83e3245e02c1b044a3976ccb0981434e6bad1bef6dc6bd8582c5cb98b2e402c04817d94caac44da5b5ecfd7e2a8a03b953862a131a2de6f4534292137e8c3e11c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}