{
  "manageEntity": {
    "action": "Save",
    "entityId": "2046587896",
    "entityType": "Track",
    "nonce": "0xea75bbdc0ab80b91c21186716760d288f45774c9fa81beb291b5d02df5d83f06",
    "signature": "0xb523b80edd2907c6ed088044bd1940637c3172e6219753f40607d1ca98062f3f143e282a0fd852b2d65db6c740cc0579ea20442bad98ce9c9fbc6a8668657a921b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}