{
  "manageEntity": {
    "action": "Save",
    "entityId": "1675539721",
    "entityType": "Track",
    "nonce": "0x49c8d303240bc4939a8b2a0fcf30481877075ac015c7893423655fc2669f1a90",
    "signature": "0x613cb005d1ba3556e86fe9708f00eed4456fcbabcd45a74ad2f9b4635d7982856d9feb3248f64aba5f2e287675bd2f04566a1123f99694cf626be22c388e234f1c",
    "signer": "0x697B9B9E4eD334E787D1C9b050bBd6A12bF84208",
    "userId": "20671471"
  }
}