{
  "manageEntity": {
    "action": "Save",
    "entityId": "1003949316",
    "entityType": "Track",
    "nonce": "0xdde69b031207df1f33f11cb7f4493d2666a75132eaa3b17e0b5147d277397377",
    "signature": "0x154731dc153e59a13e58575cc651c4328b1534b0f596a07259adce4db88edaa160a3e8643c2c7748f69d6cd31c539fa5cf84527768ffd8d0f4782cdea7fa07011c",
    "signer": "0x7fB23CaDa61ACB0c4fCc650FDE57c3B812d4A5f4",
    "userId": "66130"
  }
}