{
  "manageEntity": {
    "action": "Save",
    "entityId": "63201",
    "entityType": "Track",
    "nonce": "0xffea7ef17fc29d743364d771d60346cfe2189246e69597aafba94d3a248038c6",
    "signature": "0x61dd4b074a430261044f62b5c5eb4d22742ee4e11d552b326c564d6ac71aef8439c4c33823ce61ec42b32879567d3f265681897b11c701c742168a2d04e35e2b1c",
    "signer": "0x742Fff9be20F80Ce7285c8Ab12B9018Ef3Cf14F0",
    "userId": "111467392"
  }
}