{
  "manageEntity": {
    "action": "Save",
    "entityId": "222472",
    "entityType": "Track",
    "nonce": "0x0689416bcd3ad092c6402f4761f43d2cab34640a29c6540b81ea44ed7c20d069",
    "signature": "0x33f2d9c555fd3b45f015747d054e01803a075d56a90d6c55c760c492d023c7fd0385a8536f4260ab5a09369c6759e02028b7b320ab4a294795f5353a196b3fa31c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}