{
  "manageEntity": {
    "action": "Save",
    "entityId": "1545584324",
    "entityType": "Track",
    "nonce": "0x609a356d5e8be3e4b293791d2f6bd67b223ebd840016ea94cf1137c89fe678fd",
    "signature": "0xbdcaf0f3dd9569550a271895d026cbf04a1d22c76c28e52a9702782282d27fce5312249e6663926596d7e526c4a74c65016f9218a5bc52840b313ffdf1c8e9c01c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}