{
"manageEntity": {
"action": "Save",
"entityId": "508425804",
"entityType": "Track",
"nonce": "0x2c5eae4d5d705e933aae0ccd00de66fd60788d4a2340fb52eb4ddf3e631feeba",
"signature": "0x1ead65e8147fc1bdf2001b5f37404dfd7c8283d81ea40c56f6db882df45eba94586a698ad79cff3c0115ca95c6659a1a4086731c3763e36be7864c7b7c391a521c",
"signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
"userId": "35251"
}
}