{
  "manageEntity": {
    "action": "Save",
    "entityId": "11498228",
    "entityType": "Track",
    "nonce": "0x0ded3f028cf3765887c74188729d6d93663f89c6baa23b06d09ddae9c208b532",
    "signature": "0xb314056d75fc98db989cec503d9031e9a69e26d1e262805c692b7043b757209e42c6714a802a4711f51cf68d1a6126528e3366c3d6f4246a242e2fce0759f2081c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}