{
  "manageEntity": {
    "action": "Save",
    "entityId": "1951142795",
    "entityType": "Track",
    "nonce": "0xdea966bc66ad99871ca60e3b511b3be0314800eb26038e1963f3d25f47bda8c2",
    "signature": "0x69cb26bcded0f9fbd232f981b46bea1289b618a24065bc0903f71edf5f9060292eb899d87d4bb9f8069fb2e88e809f0f5a2007209b6c425c7d57b916208d86511c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}