{
  "manageEntity": {
    "action": "Save",
    "entityId": "984891490",
    "entityType": "Track",
    "nonce": "0x9b89f10c8ac5c001f4289c2530e1ebd21967eaa36cea35ab1e38d32cf01d3aff",
    "signature": "0x6065e011157ac6956a45fe25140154ed4b5fad184dd190e6d729cabefa6b330e00bcb4ae61a91d0583347177c2a61a2371d0af1c863e40bc925d1d90ba8770be1c",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}