{
  "manageEntity": {
    "action": "Save",
    "entityId": "625986619",
    "entityType": "Track",
    "nonce": "0x163205c1dc08b55ca431099d4f08f28f7bca8874b40986e1304598df3e527c72",
    "signature": "0x125dd58818968e2df3faba3ae557faf319e4ad9de92e983b86f2ecc8192e3d1e638a1878ec5839481e24793c2dd7537f6729932479a41a05cfaceb6766c14c741b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}