{
  "manageEntity": {
    "action": "Save",
    "entityId": "89638122",
    "entityType": "Track",
    "nonce": "0x7dde3486f5124140c8022fbb52fd09f6f0ba17407f4170098285d80b05c97cb4",
    "signature": "0x698f25134877cf6e2c12c07ccfcc0b7b6cb2343930922fe20a85c7b84e7a98732427ddaed36be60be9a1359758bd7ac2973b795de9a7934b3b7d5e387c3381991b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}