{
  "manageEntity": {
    "action": "Save",
    "entityId": "1420911764",
    "entityType": "Track",
    "nonce": "0x1ae5de1b24dcd435925bccf7eea702037af887017f4f65b1bf63169944d0efa8",
    "signature": "0x091de9fd2094b8cc62f283262d0c7a1ba7d1d1aa23718839d28eb61022de6f63689355685d15fa4945226a899868ff2cf54046121f192fba9ed92e100c539e3a1b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}