{
  "manageEntity": {
    "action": "Save",
    "entityId": "311090283",
    "entityType": "Track",
    "nonce": "0x0c9f73c174c7917fec1342fd43580d88c9d360b0429cb29b1a682387c502a249",
    "signature": "0x8a6ec904ad784558ff9af2ae5d8eba2cc3748fd29f59f56e657fc767903371cc67b66281ddd1978f4c6f302f2fdabe735f3e74687a9571f4df439556ea394d4a1c",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}