{
  "manageEntity": {
    "action": "Save",
    "entityId": "861478081",
    "entityType": "Track",
    "nonce": "0xd2878542648c16e5efb8f84bdb4769f9b0dfff86d5d82fc98f478a87d0c7b441",
    "signature": "0x50fd62d0772ba2cfd3a4cbcb8e143a0354574ef74e9c7f2310868ea7ad418828060b4c46a4eda6f9b4882f074408401dd586156b2b02516f6919f6f157ee16ec1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}