{
  "manageEntity": {
    "action": "Save",
    "entityId": "958057",
    "entityType": "Track",
    "nonce": "0xf7f5fb007228daa6c19b76044e51e1b1e39f5d8b0cbacb9ee0a2453ef5833677",
    "signature": "0xd653dadeeb52a908a5610f719e9c6a2c17757637f3855ada705c6866019b844c2920694e0026d72a894de5c8a69ecd4bae51c2ee7ec06422bf5067e1df3d2d701c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}