{
  "manageEntity": {
    "action": "Save",
    "entityId": "711198795",
    "entityType": "Track",
    "nonce": "0xb431f48bf890d15623e26505e857cd825c3841e3689fbedd26969ad2aad9d8d3",
    "signature": "0x0ec661abeaea88deaee77f83490ca96de9254e4faf8be3fdedc0397add24cc792b47ff2361c437a663c3f7bc0ea83e04fc5bd703fbf8bde930af9814163455801b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}