{
  "manageEntity": {
    "action": "Save",
    "entityId": "214771",
    "entityType": "Track",
    "nonce": "0xbd9cff7051a1dc0e1d009f338ae22490ff997216d4a40b6febce531cf07a4d13",
    "signature": "0x25bcaf8ade8d4b075290f65c92e89c6bb6b2ed35c6ad2f7e393af141414ecabd5e3b7d97595d86848f2dbc7a7678af4d36afd92aae3c1afa7976e079df521fc91c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}