{
  "manageEntity": {
    "action": "Save",
    "entityId": "178134",
    "entityType": "Track",
    "nonce": "0x37971d54fb07e3080d933be19d807dedc73d312a5755f4b95eb530b526f19e07",
    "signature": "0x503468f4d6ae4b7e13dfcdb572ca94c9d357db4eb936cdc7896dc95f5f88cafa038836b75924ea04d7c726d9a7a7686a8d05758440cf027a78d16ddf899d45621b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}