{
  "manageEntity": {
    "action": "Save",
    "entityId": "1984014769",
    "entityType": "Track",
    "nonce": "0x7dc42f0976d1ecdb2e04f294199f66ef49a23da0229b4228f3d2490825e89bff",
    "signature": "0xdc2711f0207e567b3a338e9f4ca7dd73209901e08b7c2ecdffbc0020a9673d942089b31de3ac6eaaa16160710f7847b0e2d2c951ee1ac3712b963b5d9eb88b281b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}