{
  "manageEntity": {
    "action": "Save",
    "entityId": "285329046",
    "entityType": "Track",
    "nonce": "0x98c4be85cb4d775971363e0507d8a341f42ab80e744b59bec8ef75916980309c",
    "signature": "0x3590e6a33c24671133c777beb52662ce7fe184f3f11386357b9b0b35e86ec9ee63cc4f1ff1d7378747eca672476554f5f53f6b9020a05286dd34b7b3d3da51ec1c",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}