{
  "manageEntity": {
    "action": "Save",
    "entityId": "1900768940",
    "entityType": "Track",
    "nonce": "0xcdb891b979fcad3ae802e358b1b9896bb76db0e0d425eade54a42713eaba1e31",
    "signature": "0xbee876b0ff3c39d07b751bb5bf982389050a6d5b7cc6d778a6d9c240c2d4dbd72f2a3d9d3d19b164cb9f91e626357ee820c3be4aa752514874790e845016606d1c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}