{
  "manageEntity": {
    "action": "Save",
    "entityId": "1943855485",
    "entityType": "Track",
    "nonce": "1792442825264127957",
    "signature": "0x7e9bd00794fb4701bf5e052c031b55a91dce692db4ca3aac0f40eee4b42d860e63742046857520ff68aeb239659cb8706d841a38b205954cea5f14b9035b1d151b",
    "signer": "0x23dF8876fD80368D375d911e3CbDFd15B8e85CB5",
    "userId": "827420993"
  }
}