{
  "manageEntity": {
    "action": "Save",
    "entityId": "1323786880",
    "entityType": "Track",
    "nonce": "0xfe33d4712ae5aa0017d80d24be87855a5167501e790b0373cb7cace70b806d01",
    "signature": "0x96164006b96cafcd4272a757a12e8f619a358c6fc233bd7a859f2d88f6cffc383db42a937dea6b9fdc7c0f4f6e3ed092bdbde1c6cd363a6d1fcf04c6ab2dc0bf1b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}