{
  "manageEntity": {
    "action": "Save",
    "entityId": "979511376",
    "entityType": "Track",
    "nonce": "0xa5cd7edb0a35631e2dcaa5457766a2c25da2efc3bf8d39d00878e75cb3515551",
    "signature": "0x99c42033a7f659418138e25a09a0febe3dcd3bac637ccb1e1424185071d92c9a083997e1789fb582225feab03f1ff991c84ecd6990bccf30a86333a27e0c9c1d1b",
    "signer": "0x697B9B9E4eD334E787D1C9b050bBd6A12bF84208",
    "userId": "20671471"
  }
}