{
  "manageEntity": {
    "action": "Save",
    "entityId": "332853",
    "entityType": "Track",
    "nonce": "0x2810afefd26d59492ea829cefd6d2d55da093e484ca5204222337d1c2acc9f33",
    "signature": "0xc6e9ba51da57a5d85e0e0f423d7e6fb66a7abbe7cac4954ca478bc7273ecaf244d5aa3dee4ac5404c4f1b934ef6eaefd2da9dd3f5c1fdd4ac2d18ecf79c4a1fd1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}