{
  "manageEntity": {
    "action": "Save",
    "entityId": "718734",
    "entityType": "Track",
    "nonce": "0xd5b8be715e2e01892c74a1df9b990f3ead4d450c2f7871846bba433effee603c",
    "signature": "0x2626287b01e25b21e128bcb7c6a5ae47bdee02549f3020585143a69fc8bc7a51284c6d3c8da7f3f75fb11d3c643643641bc428d775bb41d53a3f85cefd2665101b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}