{
  "manageEntity": {
    "action": "Save",
    "entityId": "1102133",
    "entityType": "Track",
    "nonce": "0x91965d4cd472818108f41e2e93e45705879d318f006e67a5747e25f4afb08a96",
    "signature": "0x9af5d3e0e6c64c236b07db62ce0b68348a6a12df7993714b45670a3b8c787fc66da2cc0e8421cfd84dea666076cd2d4fb3c7e009feecf4de40beefd4b3b700651b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}