{
  "manageEntity": {
    "action": "Save",
    "entityId": "537024980",
    "entityType": "Track",
    "nonce": "0x60370bbf304429709fe4c2366a538eae568637d622c273ccb297dd6de2649190",
    "signature": "0x9eb16d46a8f99505f8f82f53bf79fdd69247d8146c3ece57e8de7613cddabead5ab20f9c4f4ff988a22435ab13e6d8549a8db237d8b1a0ac0e2dc43d0e75531d1b",
    "signer": "0xDD3Cb841c7f19ec5581F8E2b14d6f7a58B92d0F7",
    "userId": "582464754"
  }
}