{
  "manageEntity": {
    "action": "Save",
    "entityId": "1956559447",
    "entityType": "Track",
    "nonce": "0x1c7844cc2561be8540e55e43e88d7add465d9c652eaec0eb96ff2d6561d8220a",
    "signature": "0xbb4dab5c2ed1c2c180322982674c4ba41146b2a4710e7ff26848290251e7d18f4d7a3ce653bfd5827152fd468af886fb84c332e7c76d8271a8f9fa5d56fb8c011b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}