{
  "manageEntity": {
    "action": "Save",
    "entityId": "216118456",
    "entityType": "Track",
    "nonce": "0x49b9bb2927091d5f5a4cd2c07723fcdd9eec929c48acb5ce14c9a2142cbe66c6",
    "signature": "0x964cf840d8d9d31bdf2afd733ce6b6d6e80b6d5c434f23c90ef7d3e7078094621901f0c88c74a027545d447a4086dbd3808747ddd9b79d5838d2869758e70fa31b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}