{
  "manageEntity": {
    "action": "Save",
    "entityId": "752087254",
    "entityType": "Track",
    "nonce": "0xbb61ba283d5d923859050c794690e61c54a54bc1c90351d5c0ce6467f179b361",
    "signature": "0x421204ebcf83d71d60cbef82206759743b714f8b007a0ff1e79bc3c35f0aa30448cff0d3a6d45bfbc2f7ab3f6accef45b04a5f177044652fa93ca699cc7c2cf81c",
    "signer": "0xD0352A3CDbDb96C5F41ec40463efEDFD03c3045b",
    "userId": "446492733"
  }
}