{
  "manageEntity": {
    "action": "Save",
    "entityId": "789136",
    "entityType": "Track",
    "nonce": "0xd561cf6af7fde30cdac76423d716ff1202df0abd6a141986267baf09bd40ccde",
    "signature": "0xb8cf0145eb1997a92023e24d7dec38a420679e11713652a260aeced9049707117d16ab980d4bca3807fa1b929e17266d99003460c1a6ef4579ff9cba25fd98591c",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}