{
  "manageEntity": {
    "action": "Save",
    "entityId": "1665347148",
    "entityType": "Track",
    "nonce": "0x3cdba71f84d9cba84c864a8bcb7486cc9c02dd212b8fa15dde89ed115295510c",
    "signature": "0x6b85d073c577d78ab8e9a303410e45dceb3e23a127883e70864ef3fa8cf335ad6db16eff70252db4e6653f810dec0bd2c00d088e698816c27ca808b81e8528371b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}