{
  "manageEntity": {
    "action": "Save",
    "entityId": "246303842",
    "entityType": "Track",
    "nonce": "0x0d08175066c274c6f20365fe3c6bd282f7cb9c8e0f415c0c888f976f433f3465",
    "signature": "0xe7c658e662611711ab194178005c90a4c615634bfb4b3e64cbba3ee72381ef813d3b3003a889f60b246bcf5efaff21815c833d13c6c100fad8a44dfbb48f5b141b",
    "signer": "0x4086Dda2D91F77cd46De0859a4de37F888508faA",
    "userId": "568518925"
  }
}