{
  "manageEntity": {
    "action": "Save",
    "entityId": "2047945918",
    "entityType": "Track",
    "nonce": "0x2a4713a1102e6881cdbd6db16504281ccad8e3ebab3e11c830b1dfe4a326d3c3",
    "signature": "0xcbced7d87fdbb5dd76e01f36204da9b2bf8832e0f5acccf6892225c1df0e736a616d1b0fe41ca3cd861c927e0da4ae1cbdb3106510e9bd42c679d824a479ab1e1c",
    "signer": "0x53d8e61f7BdCd69E26B5AAe8F197464091224DB4",
    "userId": "99786"
  }
}