{
  "manageEntity": {
    "action": "Save",
    "entityId": "531449609",
    "entityType": "Track",
    "nonce": "0x89f0689fcc06d41fb98e350f95f41424acd77e7f21cfe1294fe55bbde8610baf",
    "signature": "0x179f32bed65eec7e0cebb420d5ada5d08bd12fa9d068dd42cfcca6c927deab88412afd02309001085d29d71f5c202e55574992e8aebe9d9aeb469762b6bd63741c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}