{
  "manageEntity": {
    "action": "Save",
    "entityId": "209281",
    "entityType": "Track",
    "nonce": "0xd71eb574f79f6d163be4c5f9c6e1f5a3f8c0ed8f0e618d4b9f5b46548b47aca0",
    "signature": "0xf64abd6591f98a731767ac8fd707e57462b69462d181950319a7d59b8c21b2412e151421863d4ea3cb9e8fd4b1f21535646edb1c7d0e10c6450a777f98833fb61c",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}