{
  "manageEntity": {
    "action": "Save",
    "entityId": "1050341",
    "entityType": "Track",
    "nonce": "0x306461f9bb369de0c65148bc75ca87c36a80b7ec9a88f1b6b1ff831426be2106",
    "signature": "0xc1192f4d832dd0a3e0fce258a2406ae6ce686c9fde3c98c9d474c2a916e0290723d37e24de1fdbc4cb5b3a8c4800f5c934fc3f83bfc0935c7e8f1c44afb3f7181c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}