{
  "manageEntity": {
    "action": "Save",
    "entityId": "125115",
    "entityType": "Track",
    "nonce": "0x9bb63477dd2cda153db2179abbb759ca8abe74e5038c1aab2f7d3605c2e8c006",
    "signature": "0xe46952858f0e1dc9e6c9d6673e91e72eaf7a2594386e7033f40227df23b84039654ab49fbb92029f9e8c792bc8da7a87237d1b025293b937c7c1d71d613d01291b",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}