{
  "manageEntity": {
    "action": "Save",
    "entityId": "830355204",
    "entityType": "Track",
    "nonce": "0x292d15ec4a4dec1ff41043be5b9209913f19602f1567c29ea9fa5bd1b6e2354c",
    "signature": "0x04e63833354d49bea24accb5629af4919cadde7d38f5512d45ed6f0fa21fb22306e6cc868e4b5722b40a6cc335525e1bb9cc41dadd623b1c5c9891aedf1046221c",
    "signer": "0xBBBE9eFc177a4E708d317195Fa81aA6E8E2F7E92",
    "userId": "557135181"
  }
}