{
  "manageEntity": {
    "action": "Save",
    "entityId": "1501744385",
    "entityType": "Track",
    "nonce": "0xd2ce4251e8be3701e40b7489ef1275a7feaf781687017bf3b8b013e5e86557d9",
    "signature": "0xbc28c104250a9c76613945598c9d8fa127045236b6e32d4e02910663357f23a224031b65d4640babeb213c583558013f27cbd4ed33203dbea321e163eb4883b71b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}