{
  "manageEntity": {
    "action": "Save",
    "entityId": "2045519164",
    "entityType": "Track",
    "nonce": "0x1cd95a15f62cbdf728275a2ca88e452fe0129734280affde24b69b07b091ec6a",
    "signature": "0xa2fbcf7a374aa01736aa46df5afe36c086cd6995228efbf67a683da80443bddd36cc347026a0c7dfed3537e68e269f7c02ca029ee98d7c87998144b86d3f3f101c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}