{
  "manageEntity": {
    "action": "Save",
    "entityId": "270127111",
    "entityType": "Track",
    "nonce": "0xa0519f4b97b60c6c001f0d999e340612ab24a8f419296f383a41c9d48f0fa47f",
    "signature": "0xb29f32fdd88a3f1355751b711b48e6b4bb03305cb1cece40f1f6bbe4c0b8095305bf07f373f4a5e2038dae3e11b70f9b8640bf3e783b476453aea775d89ad6741c",
    "signer": "0x102a924C1c076Dcb5816d20E32Dcb6F00e75F2C9",
    "userId": "485987672"
  }
}