{
  "manageEntity": {
    "action": "Save",
    "entityId": "1348703112",
    "entityType": "Track",
    "nonce": "0x65e9b46cf374b911dc9ce29c8927b0837c773f848fb27f41b8dc7d32681cd7fd",
    "signature": "0x547f7231be6d96997b3603d4f7e7308e2ed95c8a8dfcf0b43c2158a642960cee7da6e29c2af97a682c247da60ce014c311f9aa64e5770764868922dbe5de16ba1b",
    "signer": "0x2D566E1DaC6fc148a694abe846B32e39B6584aa5",
    "userId": "890889753"
  }
}