{
  "manageEntity": {
    "action": "Save",
    "entityId": "415648717",
    "entityType": "Track",
    "nonce": "0x502f6136bec525d6d066db3e07eb03d57205b9b4ed440525249fac5327d6d068",
    "signature": "0xb7f7ce11d0d8c288bcf5112f0a73fb72855e8030f6af90a54d89fa0c68c0ed1a6f1b51c2081c7ba928d7d421cd2f55b8f530b54c063b5d01e08f34f6810334671c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}