{
  "manageEntity": {
    "action": "Save",
    "entityId": "2009815714",
    "entityType": "Track",
    "nonce": "0xf653ca7352b73fd54587b7db278e5a3c8a9d9f5a2b9077dc7b5ef6f0c674f666",
    "signature": "0xd116010161da5e2d3aa0b7503f936e941a28029b94b1a53b8cc275f19d8a186e5176d7f75fda296091cf6e08685a217ae6159ccb2341db36b59d1a1f7c6f851e1c",
    "signer": "0xbbB98413eB671bb0000F0b18A2A7Cae9631043E1",
    "userId": "98311147"
  }
}