{
  "manageEntity": {
    "action": "Save",
    "entityId": "1303714382",
    "entityType": "Track",
    "nonce": "0x74c9d3edd992b16b645b40ccbb36645ff717ef0d3c8200ba3798aecaabe4cedf",
    "signature": "0x67f04e278930e8f42f553427141c9f850a1e267b67af5ed02bf12b6d5b6c90426490bbb7ed858349f48336e962e6412ba8ba9c7ca73b669b6a8b94cb94313dd41b",
    "signer": "0x568426a5D555ADe94657d547B2Df4a4dc1f0C014",
    "userId": "71569007"
  }
}