{
  "manageEntity": {
    "action": "Save",
    "entityId": "1463939921",
    "entityType": "Track",
    "nonce": "0x7f7b9848e6103fc3360556c32466bb492554b1c0a3beb6944445a07d3cca4c12",
    "signature": "0xfb5167394199c0546bf9df2bc55c119ef9812e5e96c3f2ca3e43708b6eabacc8402e18c24ac6deb48fefedc75d134e1c203068546c073140accdecbd3b6c9b801b",
    "signer": "0x866c9135AB994f6F3351c1ED8F1c3f8bA8eDDafE",
    "userId": "954104006"
  }
}