{
  "manageEntity": {
    "action": "Save",
    "entityId": "994703",
    "entityType": "Track",
    "nonce": "0x6626ebbcb254d218b17cd00670136deec86b1dd1a55d1da1b10c42e037bc5dc2",
    "signature": "0xc741559ad1d0a5659a827c21800dee3f65e87b88d6eea156a8386b873e6ef56216be2495454e9b7f6bc0c0949accffab84e3146fc0cb0afcaf91b7ae2da95c881c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}