{
  "manageEntity": {
    "action": "Save",
    "entityId": "1190501229",
    "entityType": "Track",
    "nonce": "0xd5546f2f5771686c1aa46db244c645fe448853363e3a6c41a4066861d887ca36",
    "signature": "0x6c0bf77d9beab97b1333f247993a71ed97b11ac69fa8044f60406e243ae181425f4d01abb94d7fa3b0f93916134945c823b8cbf2a4a5ed24ee3fc671b47798121c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}