{
  "manageEntity": {
    "action": "Save",
    "entityId": "1075807",
    "entityType": "Track",
    "nonce": "0x3c120cf1c6db187792c146c856fe9b5a5d82c068c87c83f6f27f5f07e900a178",
    "signature": "0xfddb0e9e6746ae8b2af0e6fe678cafa619c4088eb1edf86b9c517fcc622d3c281a0c3a1e8ea527379cda7cf91141b5ce2b181b94d36d15b57051e25953205b741c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}