{
  "manageEntity": {
    "action": "Save",
    "entityId": "366373713",
    "entityType": "Track",
    "nonce": "0xfa61c8c2b27796c020ad4cca12b63a52d505f67fa6b44c61257b1a68cddf1739",
    "signature": "0x1bcc24be0728dd9f4f9e9237a9588130412a9660cd2ed14cc23efe28bde3cf794289cc14d73e59c686a75c661e45f3f02251a63e1cb000b32dd69f890aaa08071c",
    "signer": "0x15B9643abE09bd37C52a5BD1dCF938B05b06cBFB",
    "userId": "370091516"
  }
}