{
  "manageEntity": {
    "action": "Save",
    "entityId": "1910052752",
    "entityType": "Track",
    "nonce": "0x2d68077dae125e11f11b1609b998ed027f744e5ed290a3863889fd5fc2180c2b",
    "signature": "0x5a5528ae892ddfc72107324ab03b11abb5b064190a7a2f7696c9b4b839d9320b4d33e3650371931def4476f08e5fd2514b5964ba9cad642ac4a9da26e7cdc0c71b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}