{
  "manageEntity": {
    "action": "Save",
    "entityId": "98781480",
    "entityType": "Track",
    "nonce": "0x72ae8f4922b9d9a85f8f158654f55fd90f5dc6c9c86c2b849ece74531f9e5950",
    "signature": "0x15e476f7039be34f6ba282a920e006f9dece234e3d928dae5f3b718e28af38b604e2099d2718651d2d5f19d2c84b60d5fea0d22cab586db617f99865502837df1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}