{
  "manageEntity": {
    "action": "Save",
    "entityId": "32421617",
    "entityType": "Track",
    "nonce": "0x6984d0a53348e00c9735d4300754c8e905b2cb484de8f6af27ed19320e6afa2f",
    "signature": "0x5f4cf9ce0d91516bdce67c21c4d5b5fe1fafd7a4218837b8bfd28ef83f3a39f86dcaee6b00ae534a8919c34c5c5479cd3c2a1d392d6ab8abb4a3ae6ec309506f1b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}