{
  "manageEntity": {
    "action": "Save",
    "entityId": "601582131",
    "entityType": "Track",
    "nonce": "0x9fd08b855908a4f7c2bb0c55ae486e6b1a6ac2c505dd795f8409175317092154",
    "signature": "0x71f26d4f7740cfcd3674031c37c68c6b530bd227788d4d290002179a0540703850d1c5e945aaf3419875d54168f09971961c0ca8f7681c1ea7760c893cb416c31c",
    "signer": "0xca797dA7dCB793742623d55EA81fb92A9566B550",
    "userId": "363062902"
  }
}