{
  "manageEntity": {
    "action": "Save",
    "entityId": "21732",
    "entityType": "Track",
    "nonce": "0x8a8ff0cfce295efad08791f8fbdd043597147830f00fa3047d2c8cc7e25cdf08",
    "signature": "0x4c8b89052054c42e045817838d2ca7b41fe79be68a59aa7bbe9cd21793fb9252658087044957e4ce6ca7950437d6af8904b16c4961841df50638aae25a774c3e1c",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}