{
  "manageEntity": {
    "action": "Save",
    "entityId": "2117372664",
    "entityType": "Track",
    "nonce": "0xa6e1fbf5cb79e3f7383f8f393420bdc851e4788be3a245bfa0d6b636be41d63c",
    "signature": "0xc287e58fc44f56034f6aaa9239f7cd544a8f73cce377cff3ea05c24a40174e5132f26baf099a2803124648e8b5d72156c13027b5ee23eb7fea97a9e6609dc2591b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}