{
  "manageEntity": {
    "action": "Save",
    "entityId": "379562324",
    "entityType": "Track",
    "nonce": "0xe32f8f36040c465dbe519e83a4debea36c2ddd13dcfa39c964edbab986ec5948",
    "signature": "0xd1f7fe4bc6d7533fbda518ee800aa77d33ce6ca50344d30c6987dff79eba3dd04b03fda680402b11f0c08d0fcbe68fa6be4c4fe576543844f2e3248cb9ba396c1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}