{
  "manageEntity": {
    "action": "Save",
    "entityId": "302611431",
    "entityType": "Track",
    "nonce": "0xee4aa361ce71405691efbefdb8b334fd1c4cdee03e23ab8b1785549263d877d3",
    "signature": "0xe287802a9690605f53e85469f03ef32b7804974bf1fb14d8c9bc6a1039b4a7610482f3d8475fca64597a0ba82ba6e17165ace39a5540d7634b53655a67fe1afd1c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}