{
  "manageEntity": {
    "action": "Save",
    "entityId": "990999",
    "entityType": "Track",
    "nonce": "0x32c9d10a87ecbb237ee9518d07859bd14b7f4a32bcf7ab75be0e083f26eb832b",
    "signature": "0x3d414bfeb6bc84d597e549670f6c4c551470929456566e51bdde48df9ffbd8d4051cd22e8c44f3ce4ef67720fed9762e12d54398a890460cf373cd44369b67ab1b",
    "signer": "0xF08935327AeC6306C8d0eb92999567e5496848C9",
    "userId": "989073793"
  }
}