{
  "manageEntity": {
    "action": "Save",
    "entityId": "675624208",
    "entityType": "Track",
    "nonce": "0x0cb872d7565dcab7b6128d8a0ff5e2ccdb427e683f2a521de5ff5855a2fb616f",
    "signature": "0x484b8b1371cbe857b5d0682965e7f49dcd04199c80fc81ccd2c47b82a6f96d344f8310f363b4ef3cdd4c74372daef78221990618de74613db003f683a1ce13f41b",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}