{
  "manageEntity": {
    "action": "Save",
    "entityId": "636944592",
    "entityType": "Track",
    "nonce": "0xf8efbfce10900302474d7fffc1974a4842ffb59e800ca9ed4216d1afda26cff1",
    "signature": "0x84c051f831b21da0790a729c486ffc36ac070d7a40db18a36ead318ce951c06d231ea817442896aa970fcbc4709cab046f48ad2b9e774c1ca3df5b59cd0556981b",
    "signer": "0xE7c5B65B708a4B3A6F3340Cf03c31929Bc6e8e28",
    "userId": "205876401"
  }
}