{
  "manageEntity": {
    "action": "Save",
    "entityId": "242591261",
    "entityType": "Track",
    "nonce": "0xc237e81873cc5df84dec2030fa7c20a19efb5b600f2c2f90121858a48f466cc6",
    "signature": "0x8f3be9299a46d188e02f6eac91530083828d7778a3ce114a26c5faaf22d022354f0b396729b290fb988ff3a442179eefa609936c162729f13419d5cb3e977cc51b",
    "signer": "0x26Feee0AaDc0e2d8f7aBEd5cdb0bCD7D325F618d",
    "userId": "354535"
  }
}