{
  "manageEntity": {
    "action": "Save",
    "entityId": "87222376",
    "entityType": "Track",
    "nonce": "0xaec74369d699552a974f6bdf74d7c686ed20a1116e5fb650eb26068fb82545b3",
    "signature": "0xbfa23faf2a5c6d7f41e213ad861b8370a04136775fdb6fb5dbed29232f1aa83f53986319dbb9f9e61f3ff1fdd5f38faed96fac971a1eea521371c5e4f24497c61c",
    "signer": "0x59765b22C96E88dA578af23E8611d6ca2dcCd7C9",
    "userId": "377610060"
  }
}