{
  "manageEntity": {
    "action": "Save",
    "entityId": "2041123293",
    "entityType": "Track",
    "nonce": "0x62d426307a148005b0031141435a6c4acd6902993d983bf8b4401a0b73281d9b",
    "signature": "0xe7fe781703291b63a47bc270d3bd5b169029e4dc7998f06a08c5f00ba5e002c72b2bd9c80b160f2941f6e991aa502c71eaa2b08f142ae8ba9ce3a7374f9974ad1b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}