{
  "manageEntity": {
    "action": "Save",
    "entityId": "1946960797",
    "entityType": "Track",
    "nonce": "0x55fb00603ca4ffba5399570e133a36b0d4481dddb1a9b1d02274a8a702e86d2b",
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    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}