{
  "manageEntity": {
    "action": "Save",
    "entityId": "963831",
    "entityType": "Track",
    "nonce": "0xf6de17ec7679e690cc0218dcf69f6a238b169eb99ee55f2b5c67ed4c8f6bbeb3",
    "signature": "0xeab44bda80503d0bfe8e913c1ae83eb55a00f962389712cc5b4a6d9a58b5021b24c3f2b67a20dae2c156f2b5f10ec5a4b98f2f90fc8de95ff68187819de28da51c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}